Oklahoma’s first Zipline Canopy Tour is an adrenaline rush from the get-go. POSTOAK Canopy Tours & TreeTop Adventure Park takes thrill seekers and nature lovers soaring above the treetops along a network of more than 4,000 feet of cable line. Along the way, seven platform landing-bases provide a bird’s-eye view of northeastern Oklahoma’s magnificent Osage Hills, the surrounding plains and Tulsa’s cityscape. The sparkling view of downtown’s skyline is especially spectacular at night.